<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */


/**
 * Smarty {fetch} plugin
 *
 * Type:     function<br>
 * Name:     fetch<br>
 * Purpose:  fetch file, web or ftp data and display results
 * @link http://smarty.php.net/manual/en/language.function.fetch.php {fetch}
 *       (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param array
 * @param Smarty
 * @return string|null if the assign parameter is passed, Smarty assigns the
 *                     result to a template variable
 */
function smarty_function_fetch($params, &$smarty)
{
	if (empty($params['file'])) {
		$smarty->_trigger_fatal_error("[plugin] parameter 'file' cannot be empty");
		return;
	}

	$content = '';
	if ($smarty->security && !preg_match('!^(http|ftp)://!i', $params['file'])) {
		$_params = array('resource_type' => 'file', 'resource_name' => $params['file']);
		require_once(SMARTY_CORE_DIR . 'core.is_secure.php');
		if(!smarty_core_is_secure($_params, $smarty)) {
			$smarty->_trigger_fatal_error('[plugin] (secure mode) fetch \'' . $params['file'] . '\' is not allowed');
			return;
		}

		// fetch the file
		if($fp = @fopen($params['file'],'r')) {
			while(!feof($fp)) {
				$content .= fgets ($fp,4096);
			}
			fclose($fp);
		} else {
			$smarty->_trigger_fatal_error('[plugin] fetch cannot read file \'' . $params['file'] . '\'');
			return;
		}
	} else {
		// not a local file
		if(preg_match('!^http://!i',$params['file'])) {
			// http fetch
			if($uri_parts = parse_url($params['file'])) {
				// set defaults
				$host = $server_name = $uri_parts['host'];
				$timeout = 30;
				$accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*";
				$agent = "Smarty Template Engine ".$smarty->_version;
				$referer = "";
				$uri = !empty($uri_parts['path']) ? $uri_parts['path'] : '/';
				$uri .= !empty($uri_parts['query']) ? '?' . $uri_parts['query'] : '';
				$_is_proxy = false;
				if(empty($uri_parts['port'])) {
					$port = 80;
				} else {
					$port = $uri_parts['port'];
				}
				if(!empty($uri_parts['user'])) {
					$user = $uri_parts['user'];
				}
				if(!empty($uri_parts['pass'])) {
					$pass = $uri_parts['pass'];
				}
				// loop through parameters, setup headers
				foreach($params as $param_key => $param_value) {
					switch($param_key) {
						case "file":
						case "assign":
						case "assign_headers":
							break;
						case "user":
							if(!empty($param_value)) {
								$user = $param_value;
							}
							break;
						case "pass":
							if(!empty($param_value)) {
								$pass = $param_value;
							}
							break;
						case "accept":
							if(!empty($param_value)) {
								$accept = $param_value;
							}
							break;
						case "header":
							if(!empty($param_value)) {
								if(!preg_match('![\w\d-]+: .+!',$param_value)) {
									$smarty->_trigger_fatal_error("[plugin] invalid header format '".$param_value."'");
									return;
								} else {
									$extra_headers[] = $param_value;
								}
							}
							break;
						case "proxy_host":
							if(!empty($param_value)) {
								$proxy_host = $param_value;
							}
							break;
						case "proxy_port":
							if(!preg_match('!\D!', $param_value)) {
								$proxy_port = (int) $param_value;
							} else {
								$smarty->_trigger_fatal_error("[plugin] invalid value for attribute '".$param_key."'");
								return;
							}
							break;
						case "agent":
							if(!empty($param_value)) {
								$agent = $param_value;
							}
							break;
						case "referer":
							if(!empty($param_value)) {
								$referer = $param_value;
							}
							break;
						case "timeout":
							if(!preg_match('!\D!', $param_value)) {
								$timeout = (int) $param_value;
							} else {
								$smarty->_trigger_fatal_error("[plugin] invalid value for attribute '".$param_key."'");
								return;
							}
							break;
						default:
							$smarty->_trigger_fatal_error("[plugin] unrecognized attribute '".$param_key."'");
							return;
					}
				}
				if(!empty($proxy_host) && !empty($proxy_port)) {
					$_is_proxy = true;
					$fp = fsockopen($proxy_host,$proxy_port,$errno,$errstr,$timeout);
				} else {
					$fp = fsockopen($server_name,$port,$errno,$errstr,$timeout);
				}

				if(!$fp) {
					$smarty->_trigger_fatal_error("[plugin] unable to fetch: $errstr ($errno)");
					return;
				} else {
					if($_is_proxy) {
						fputs($fp, 'GET ' . $params['file'] . " HTTP/1.0\r\n");
					} else {
						fputs($fp, "GET $uri HTTP/1.0\r\n");
					}
					if(!empty($host)) {
						fputs($fp, "Host: $host\r\n");
					}
					if(!empty($accept)) {
						fputs($fp, "Accept: $accept\r\n");
					}
					if(!empty($agent)) {
						fputs($fp, "User-Agent: $agent\r\n");
					}
					if(!empty($referer)) {
						fputs($fp, "Referer: $referer\r\n");
					}
					if(isset($extra_headers) && is_array($extra_headers)) {
						foreach($extra_headers as $curr_header) {
							fputs($fp, $curr_header."\r\n");
						}
					}
					if(!empty($user) && !empty($pass)) {
						fputs($fp, "Authorization: BASIC ".base64_encode("$user:$pass")."\r\n");
					}

					fputs($fp, "\r\n");
					while(!feof($fp)) {
						$content .= fgets($fp,4096);
					}
					fclose($fp);
					$csplit = split("\r\n\r\n",$content,2);

					$content = $csplit[1];

					if(!empty($params['assign_headers'])) {
						$smarty->assign($params['assign_headers'],split("\r\n",$csplit[0]));
					}
				}
			} else {
				$smarty->_trigger_fatal_error("[plugin] unable to parse URL, check syntax");
				return;
			}
		} else {
			// ftp fetch
			if($fp = @fopen($params['file'],'r')) {
				while(!feof($fp)) {
					$content .= fgets ($fp,4096);
				}
				fclose($fp);
			} else {
				$smarty->_trigger_fatal_error('[plugin] fetch cannot read file \'' . $params['file'] .'\'');
				return;
			}
		}

	}


	if (!empty($params['assign'])) {
		$smarty->assign($params['assign'],$content);
	} else {
		return $content;
	}
}

/* vim: set expandtab: */

?>
